Wrench.



,J. EVANS.

WRENCH.

APPLICATION FILED MAY 11, 1916.

1 290,530. Patented. Jan. 7,1919.

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- Inv E IT [Tar 30311 ETTANS, OF BROOKLYN, NEW YORK.

WRENCH.

Specification of ietters Patent.

Application filed liay 11, 1916. SeriaINo. 96,870.

T 0 all whom it may concern: 4

- Be it known that I, J OHN EVANS, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Wrenches, of which the following is a specification.

My present invention relates to wrenches and more particularly to that class embody ing a flexible device, such as a chain, to em brace the object to be rotated.

The principal object of my invention is to provide a wrench which is susceptible of quick adjustment to act upon objects, such as pipes, nuts, bolts, or caps for containers of various sizes, and which will brin uniform pressure upon the periphery of o jects,

rendering the wrench well adapted for use on pipes or other objects whichare collapsible, or those which are frangible such as glass tubes.

Further objects of my invention are to provide a wrench which is adapted for use on objects having a highly polished surface, and which become dama ed to a degree rendering them useless, i acted upon by a wrench having serrated faces; and, to pro vide a wrench which is inexpensive to manu facture, and susceptible of ready repair.

Other objects of my invention will appear in the following detailed description, taken in connection with the accompanyin drawings, forming a part of this speci%cation, and in which drawing:

Figure '1 is a side 'elevationof a wrench constructed according to my invention and shown in operative relation to a pipe section.

Fig. 2 is a top plan view of the same.

Fig. 3 is a fragmentary perspective view of a portion of the operating-lever.

Fig. 4 is a perspective view of a side of a master link.

In the drawings, wherein similar characters refer to similar parts throughout the several views, A designates a flexible device such as a chain; B an operating lever; and, C a master link.

As to the chain A, it is preferably made up of blocks 6 and connecting plates 7, of any suitable shape; and, pins 8, which may extend beyond the plate 7 to provide lateral projections 9, clearly shown in Fig. 2 of the drawings. These pins may be held in place, in any suitable manner, such as by upsetting the end portions adjacent {the plate 7, this matter of retaining them in place rendering the chain susceptible of repair should any of its parts become broken or mutilated.

Referring first to the form of wrench shown in Fig. 1, the operating lever B comprises a head 10, rounded as at 11; a handle 12 extending from head- 1 0; and, two laterally projecting abutments 13 in spaced relation as clearly shown in Fig. 3. These abutments 13 are positioned laterally of'the longitudinal axis of the lever and laterally of the portion 11 of the head 10. They may 'be provided with concave faces 14 atthe bottom of the lever for engagement with the projections 9 of chain A.

Referring now to the master link C, it comprises sides 15 and cross-pins 16 and 17, the pin 16 passing through one of the blocks 6 of the chain A, and joining the sides 15 at one end portion of the link. The pin 17 joins the other end portions of the sides of said link, and may pass through a bore 18 in the lever B. The sides or master links 15 are provided at their free ends and at their inner faces with bosses or projections 19, facing each other and through which the pin 16 extends to hold the said block or link 6 of the chain A between the bosses The bosses 19 are provided, upon their inner sides facing the lever B with peripheral cam faces or loops 20 which are rounded to provide supports for the links of the chain. In the modification shown in Fig. 4, the sides 15 may be :connected by a web joinin the projections 19 and formed integral with the sides 15. In assemblage the block of chain A having connection with the master link C is positioned between the projections 19 of sides 15, and the free end portion of the chain is trained between the sides 15 so that the plates? of the chain ride upon the rounded supporting faces 20 of the'section. The space between sides 15 of link C, opposite from the projections 19 is relatively wider than the space between said projections, and is substantially the width of head 10, so that the abutments 13 are conveniently positioned for engagement with the projections 9 of the chain.

When operating the wrench, the lever B is swung at substantially a right angle to link C moving the abutment 13 out of proximity to the object D, such as a pipe, and thereupon the chain is trained about Patented Jan. 7, 1919.

the object with its free end portion extending between the sides 15 of link C, as hereinbefore described, the free end of the chain being pendantly supported over the blocks and plates of the chain adjacent its connection with said link. The lever B is then brought downwardly with its abutments 13 engaging projections 9 of the chain adjacent the link C. Byv bringing pressure upon the lever B, the chain A is drawn tightly about the object, however, uniform pressure is brought upon its peripher due to the line contact of the blocks and plates of the chain with the external periphery of the object. sired to release the chain slightly from such engagement, the lever B is swung so that the abutments 13 move away from the pin 16. The object D, may be rotated, or partly rotated, by oscillation of the operating lever, and movement of the chain A circumferentially about the axis of the object;

Changes in details may be made without departing from the spirit and scope of my invention, but, a

I claim: v

A wrench comprising in combination, an

When it is de-.

operating lever having on one end a pair of transversely spaced apart lateral pro- 3 jections curving outwardly and presenting concave faces outwardly of the end of the lever, a pair of master links pivotally connected to the opposite sides of said lever at said end thereof and having bosses on 3 their inner faces and at their free ends providing supports, and a chain comprising links and side plates connected by trans verse pins projecting through and beyond the side plates, an end link of the chain 4 being secured between the bossesof said master links, and the free end of the chain being adapted to be trained over an object, through the space between the master links and over said bosses, the bosses supporting 4 the side plates at the free end of the chain in the path of said lateral projections of said lever, said lever being adapted to be swung in a direction to move the projections thereof toward the bosses, and engage 5 the adjacent pins of the chain outwardly of the links and in the concavities of the projections to draw the latter circumfer- 

